1143430321 has 16 divisors (see below), whose sum is σ = 1279540800. Its totient is φ = 1012947520.

The previous prime is 1143430297. The next prime is 1143430331. The reversal of 1143430321 is 1230343411.

It is a cyclic number.

It is not a de Polignac number, because 1143430321 - 2⁵ = 1143430289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1143430292 and 1143430301.

It is not an unprimeable number, because it can be changed into a prime (1143430331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80286 + ... + 93448.

It is an arithmetic number, because the mean of its divisors is an integer number (79971300).

Almost surely, 2^1143430321 is an apocalyptic number.

1143430321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1143430321 is a deficient number, since it is larger than the sum of its proper divisors (136110479).

1143430321 is a wasteful number, since it uses less digits than its factorization.

1143430321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13376.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1143430321 is about 33814.6465455430. The cubic root of 1143430321 is about 1045.6906741083.

Adding to 1143430321 its reverse (1230343411), we get a palindrome (2373773732).

The spelling of 1143430321 in words is "one billion, one hundred forty-three million, four hundred thirty thousand, three hundred twenty-one".